Diymall Voltage Sensor Dc0-25v for Arduino with Code(pack of 2pcs) Voltage input range: DC0-25V Voltage detection range: DC0.02445V-25V Voltage Analog Resolution: 0.00489V DC input connector: Terminal cathode connected to VCC, GND negative pole Output interface: "+" then 5/3.3V, "-" then GND, "s" then the Arduino AD pins